Barrel locking ring



BARREL LOCKING RING Filed Feb. 2, 1940 I fizz/222232."

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Patented Sept. 23, 1941 "BARREL LOCKING RING Colin B. Dale, Oak Park, 111., assignor to'flornell Securities Corporation, Cleveland, Ohio, a. corporation of Delaware Application "February 2, 1940, schema-316.996

Claims.

This invention relfies to locking means for metallic receptacles or containers and particularly to the type in which thecylind'rical body'portion is open at one end and is formed with a bead extending around'its openend. A barrel or drum of this type is provided-With a cover-for its open end having a flange which fits within the bead and is;bent to overhang it; then a grooved ring, split at one point in its circumference, is

fitted over thebead and the overhanging portion of the flange, usually with agasketinterposed between the bead and flange, so that when the clamping ring'is contracted in this position the cover is secured firmly to the barrel, forming a fluid-tight seal therefor.

One object of this invention is to'provide a clo'si'ngor clamping device, operable without the aid of tools for removably securing such a cover on'a drum or barrel of the type indicated. Another object is'to provide means for applying the closing or contracting force-to the clamping'ring in an efficient manner andwithout any appreciable tendency to distort the ring. "A further object is to provide a clamping ring of the type indicated with contracting means which shall be rugged in construction, inexepnsive to manufacture and simple to operate. Other objects and advantages of the invention will appear from the following description. The invention consists in certain features and elements of construction in combination, as herein shown and described and as indicated by the claims.

In the drawing:

Figure 1 is a top plan view of'a barrel or'receptacle with its cover secured thereon by means of a locking ring embodying this invention.

Figure 2 is an enlarged fragmentary section taken at the line 2-4 oniigure =1.

Figure 3 is a fragmentary plan view of theadjacent ends of the locking ring'showing them in contracted or locked position and indicating the corresponding positions of the operating lever and link.

Figure 4 is a fragmentary plan view of the parts shown in Figure 3but illustrating them with the'locking lever released and with the ring expanded to allow removal of the cover.

Figure 5 is a fragmentary 'elevati'on'takenas indicated by the arrows 55 on Figure 3.

Figure 6 is a fragmentary'section on the-same scale as Figure 2, taken as indicated at line 6 6 on Figure 3.

Figure 7 is afragrn'entary section taken at line -on Figure' to-indicate the-clearance'ab In the accompanying drawing I have illustrated one embodiment of my invention as designedfor 'applicatiohtoa metallic shipping drum or barrel I, The upper edge of'the drum is rolled to form ahead '2 at the openend; and a cover 3 applied to this end, includes an upwardly extending flange 4 terminating in an outwardly projecting portio'n 5 which overhangs the read 2 preferably with a gasket'orpacking strip 6, inter'posed, as shown in' Figure 2. For locking this cover in place there is provided a channeled clamping ring which is s'plit transversely'at one point in its'circumfer'en'ce 'to allow its ends to be separated fo'reXpan'ding the'ring and releasing the cover 3 or to be drawn together for contracting the ring around the bead '2 and thus clamping the flange?) in sealing position thereon. I'he ends of the ring I are provided with inwardly' extendinglugs 8 and 9 which may be formed integrally "with-thering, or welded thereto. Alocki'ng lever i0 is fulcrumed on the lug 8 and apair-bf links H connect the lever with the lug "9 being ;-s'e'cured-ag'ainst the upper and lower faces of the lever and the lug, as seen inFig'ure 5. The lever in is 'disposed' on the under side of the lug 8. l I

-In certain'conventionalconstructions the fulcrum connection of the 1 operating lever and the connection of the link to the lugs of the ring have been inthe' form of fixed-pivots, but in that case, when the handle-is 'swim'g to closingposition, the pull exerted against the lugs is so much out-of'line'with the ring itself that a considerablebending'niovementisset up at a distance back from each-end of 'tl'ie ring where the lug connects 'with'it. "Ihis-tends to" distort the end portions of the ring outwardly so that they are not effective inhblding the cover-tightly to the bead'of'the drum at-that point, and Underextreme tension the end portions of the ring, including the lugs-may e'Ven 'fail-and break away, due to the excessive tension introduced by the bonding forces.

The present invention-overcomesthese defects of conventional design-by providing'slots l2 and I3 in the'lugs "B and 9, respectively, which extend obliquely with relation'to the circumference of the ring 1 and in convergingrelation outwardl'y thereofwith 'respectto each other. The he-adedpin 'or loose rivet I'4 b'y which the lever ID is fulcruinedbn the lug" 8 engages inthe slot l2 'and a-similar pin or rivet ii-"connects the link with the lug 9 by engagement inthe slot 1-3. The slots [-2 and 3 terminate outwardly, as close eis ptissible to the flah'ge rsethat with the pins I 4 and I5 shifted to the outer ends of the slots, as shown in Figure 3, the closing tension applied to the ring is exerted as nearly as possible in line with the ring itself, and without any considerable bending moment to distort the ends of the ring. The oblique and converging relation of the slots I2 and I3 causes the pins l4 and I5 to be forced to the outer ends of these slots; and, preferably, the pins are formed with enlarged heads 14 and- I5 respectively, which are thus forced into contact with matically by a force which crowds the heads I4 points close to the extreme ends of the ring "I so as to draw these end portions snugly in place;

against the head 2 and within the normal circumferential outline of the ring 1. words, the bending moments which are present in the conventional structure, and tend to distort the ends of the ring, are not only eliminated by the sliding of the pins l4 and IS in the closing action, but this shifting movement is itself employed to cause the ends of the ringto hug the bead of the barrel instead of being sprung away from it as in former designs. I

When the lever I is swung to open position, as shown in Figure 4, the endsof the ring I are separated, and the ring is expanded to allow its removal so as to free the cover 3 from the drum. The separating action applied to the pins l4 and I by this movement of the lever l0 shifts them slidably in their'slots I 2 and I3 toward the diverging inner ends of the slots, thus causing the enlarged heads M and l5 to travel away from the channel of the ring 1 and providing clearance, between these heads and the lower edge I of the channel, which permits the ring to be lifted clear of the bead 2. The dimension of this clearance is indicated at A on Figure 7. Similarly, this clearance will be available in placing the ring in position to secure the cover in sealed relation on the barrel or drum. From the foregoing it will be seen that I have devised a locking ring which is as economical to manufacture as previous conventional designs, but which utilizes more efficiently the force applied for drawing the ring into lockingposition and which avoids certain strain and distortion of the parts inherent in prior structures. While there is shown and described herein certain specific structure embodying the invention, it will be manifest to those skilled in'the art 1 that various modifications and rearrangements In other and 15 against the inner face of the flange 4 at of the parts may be made without departing from the, spirit and scope of the invention, and

I that the same isnot limited to the particular 1 form herein shown and described, except in so far as indicated by the appended claims.

I claimz V a e 1. In a locking device for a metallic receptacle having a bead formed about its open end and a 1 cover having aflange fitting over the head, a

contractible channeled clamping ring having portions, engaging the jbeadand cover flange to press the same together when the ring is con-,

, tracted, and meansfor contracting the ring in- 1 eluding alever fulcrumed on one end portion of the ring and a link connectingsaid lever with the other end portion of the ring, the fulcrum ring, said slots extending obliquely with relation to the circumference of the ring and converging toward it, said pivots having portions extending into a plane which intersects the flange of the cover and dimensioned to bear against said flange when the ring is contracted with said pivots at the outer end portions of the slots.

2. A split locking ring for the purpose indicated having an inwardly open channel crosssection, the adjacent end portions of said ring being provided with inwardly extending lugs, said lugs having slots formed respectively therein and extending obliquely with relation to the circumference of the ring and converging toward it, and means for contracting said ring comprising a lever fulcrumed on one of said lugs and a link connecting said lever with the other lug of the ring, the fulcrum of the lever and the connection of the link to said lugs respectively comprising pins slidable outwardly in the slots when the lever is operated to contract the ring, the outer ends of the slots extending substantially to the circle of the inner circumference of the ring whereby the final contractile tension of the lever and link is applied to the ring substantially in line therewith.

3. In combination with a metallic receptacle having a bead formed about its open end and a cover having a flange fitting into said open end and over said bead, a contractible channeled locking ring formed to engage the bead and cover flange for pressing the same together when the ring is contracted around them, said ring being split transversely at one point in its circumference and having inwardly extending lugs Quits-adjacent end portions, said lugs having slots formed respectively therein extending obliquely with relation to the circumference of the ring and converging toward it, and means for contracting said ring comprising a lever fulcrumed on one of said lugs and a link connecting said lever with the other lug of the ring, the fulcrum of the lever and the connection of the link to said lugs respectively comprising pins slidable outwardly in the slots, when the lever is operated to contract the ring, the outer ends of the slots being disposed closely adjacent the outlinesrof the ring, and said pins having head portions extending into a plane which intersects the flange of thecover and dimensioned to bear against said flange when the. pinsare shifted toward the outer, ends of the slots as the ring is contracted by operation of the lever.

4. In a locking device for a metallic receptacle having a bead formed about its open end and a cover having a flange fitting over the bead, a contractible channeled clamping ring having portions engaging the bead and cover flange to press the same, together when the ring is contracted, 'andmeans for contracting the ring including a lever fulcrumed on one end portion of the-ring and a link connecting said lever with the other end portion of the ring, guiding means on said end portions of the ring by which the fulcrum of the lever and. the connection of the link with the ringare both shifted in directions oblique to the circumference of the ring and converging outwardly with respect thereto by operation of thev lever in contracting the ring, and means carried respectively by the fulcrurned end of the lever and the end of the link which is connected to the ring, said last mentioned means projecting into a plane which intersects the flange of the cover and being dimensioned to bear against said flange when the lever fulcrum and the link connection are moved outwardly by operation of the lever.

5. A split locking ring for the purpose indicated having an inwardly open channel crossseotion, the adjacent end portions of said ring being provided with inwardly extending lugs, said lugs having slots formed respectively therein and extendingobliquely with relation to the circumference of the ring and converging toward it, and means for contracting said ring comprising a lever fulcrumed on one of said lugs and a link connecting said lever with the other lug of the ring, the fulcrum of the lever and the connection of the link to said lugs respectively comprising pins slidable outwardly in the slots when the lever is operated to contract the ring, the

outer ends of the slots extending substantially to the circle of the inner circumference of the ring whereby the final contractile tension of the lever and link is applied to the ring substantially in line therewith, the center lines of said slots, if extended outwardly, converging to a point in the ring and between the ends thereof as the ring reaches its final contracted position.

COLIN B. DALE.

. CERTIFICATE OF CORRECTION. Patent No. 2,257,059. September 25, 19in,

COL'IN B. DALE.

It is hereb; certified that error appears in the printed specification of the above numbered patent requiring correotionas follows: Page 1, first column, line 26, for "inexepnsive" read "inexpensive"; page 2, first column, line 65, claim 1, for the word "head" read -bead-; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. I Signed and sealed this hth day of November, A. D. 1911.1.

Henry Van Arsdale, (Seal) Acting Commissioner of Patents. 

